One of two proposed versions. Compartments: 2, back panel at bottom (1). Interior: depth 280+260 mm, width 420 mm, height 330+330 mm. Stone thickness 20 mm. Middle shelf: thickness 20 mm (matches stone thickness), depth 280 mm spanning the full body depth — rests on top of the bottom panel, blank width 350 mm (~70 mm gap to the right wall), end semicircle rounding radius R130 mm, blank dimensions 350+280+20 mm — rectangle before cutting/rounding.